[Click] New element problem in the Kernel level (2.6.11.6)

[Jalaja Kurubarhalli]

Hi Eddie,
  Thanks much for the reply. The class_name() returns "MyPrint" which
is the same as what I have in the router config file. I also checked
the \linuxmodule\elements.config file (in the attachment) and the name
of the element  is "MyPrint". I am using the CVS src dated June 28th
with linux  (2.6.11.6) and have applied the click patch.

The same configuration/src works fine at the kernel level with
click-1.4.3 on linux-2.4.27.

I'm new to linux; thanks for pointing out the unload module option.

-Jalaja

Message: 5
Date: Wed, 6 Jul 2005 08:49:42 -0700
From: Eddie Kohler <kohler at cs.ucla.edu>
Subject: Re: [Click] New element problem in the Kernel level
       (2.6.11.6)
To: Jalaja Kurubarhalli <jalajak99 at gmail.com>
Cc: click at amsterdam.lcs.mit.edu
Message-ID: <D8CB64B9-731E-47BF-BC80-AFB3D73B71CE at cs.ucla.edu>
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed

Hi Jalaja,

> Hi,
>  I have written a new element 'MyPrint' meant to work in both user and
> kernel level (Nothing but a copy of Print element with a bunch of
> debug messags in simple_action) and I'm facing a few issues to get it
> to work in the kernel (V 2.6.11.6).
>
> 1. When I run a userlevel configuration containing the element, it
> works fine. But I get an error "unknown element class 'MyPrint',
> Router could not be initialized" when I run the same configuration
> file in the kernel.
>
> I've gone through the FAQ and ensured that
>  a. EXPORT_ELEMENT is present
>  b. make elemlist is run
>  c. linuxmodule/elements.conf has the MyPrint.cc file
>  d. My element is in click/elements/local directory (I used configure
> --enable-local)
>
> MyPrint.cc compiles fine when I run "make install". I tried compiling
> the element with just ELEMENT_REQUIRES(linuxmodule) and I even moved
> it to elements/linuxmodule. But none of the above helped. Can anyone
> please let me know if I'm missing something?

I bet Click is providing the element using an incorrect name.  What
is MyPrint's class_name()?  Take a look at the linuxmodule/
elements.cc file, or send it to the list.

> 2. I get an error "FATAL: Kernel does not have unload support.
> click-uninstall: cannot remove Click module from kernel" when I try to
> uninstall the configuration.  Will it be a problem if I try to install
> an another router configuration without uninstalling the previous one?

Huh.  So you compiled your kernel so that it does not support module
unloading??
That's a little weird.  You probably should recompile it with unload
support.  But no, Click explicitly supports installing new router
configs without uninstalling previous router configs.

Eddie


>
> -Jalaja
>
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> click at amsterdam.lcs.mit.edu
> https://amsterdam.lcs.mit.edu/mailman/listinfo/click
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